The San Francisco Zoo is a 100acre zoo located in the southwestern corner of San Francisco, California, between Lake Merced and the Pacific Ocean along the Great Highway. The zoo's main entrance, once located on the north side across Sloat Boulevard and one block south of the Muni Metro L Taraval line, is now to the west on the ocean side of the zoo off of the Great Highway.
This zoo is the birthplace of Koko the gorilla, and, since 1974, the home of Elly, the oldest black rhinoceros in North America. It houses more than 1000 individual animals representing over 250 species, as of 2016.